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Gold Prospecting
Small Scale Gold Mining
Mapping the strike zone on topo maps
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<blockquote data-quote="SWright" data-source="post: 416053" data-attributes="member: 1541"><p>G'Day Bjarvie</p><p></p><p>I was an exploration geologist so might be able to help. First of all you have to know exactly where you are on the map or aerial photo. Or if you are using an electronic device the same thing applies. Get hold of a geological compass or a prismatic compass will also do. Go to the vein and take a reading of the direction of the vein, rock, cleavage, bedding or whatever the feature is you want to measure. That is the strike of the unit. Correct the reading for magnetic drift and you will have a true strike at that point. I would take several readings all over a unit from one end to another.</p><p></p><p>If you cannot get hold of a compass and you have a large scale map simply plot the position of one end of the vein and then go and locate the other end of the vein and the line between them is the strike when you plot it on a map. Beware though that in rugged terrain there will be distortions to the true strike if the vein is dipping at a shallower angle than the vertical. Also not all strikes measured on individual veins by any means represents the true strike of the vein systems as a whole. </p><p></p><p>Araluen</p></blockquote><p></p>
[QUOTE="SWright, post: 416053, member: 1541"] G'Day Bjarvie I was an exploration geologist so might be able to help. First of all you have to know exactly where you are on the map or aerial photo. Or if you are using an electronic device the same thing applies. Get hold of a geological compass or a prismatic compass will also do. Go to the vein and take a reading of the direction of the vein, rock, cleavage, bedding or whatever the feature is you want to measure. That is the strike of the unit. Correct the reading for magnetic drift and you will have a true strike at that point. I would take several readings all over a unit from one end to another. If you cannot get hold of a compass and you have a large scale map simply plot the position of one end of the vein and then go and locate the other end of the vein and the line between them is the strike when you plot it on a map. Beware though that in rugged terrain there will be distortions to the true strike if the vein is dipping at a shallower angle than the vertical. Also not all strikes measured on individual veins by any means represents the true strike of the vein systems as a whole. Araluen [/QUOTE]
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Gold Prospecting
Small Scale Gold Mining
Mapping the strike zone on topo maps
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